[EDP] Change "Jar" job type to "MapReduce"

[Trevor McKay]

The current "Jar" job type should be changed to "MapReduce" so that it maps more directly to standard Oozie actions.

Note, this is partially in preparation for support of Oozie "java" actions which will have a corresponding "Java" job type.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/62058

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/62058
Committed: https://git.openstack.org/cgit/openstack/savanna/commit/?id=aa303d724c2c1db5bad5d3aadad6c4a6d6c85004
Submitter: Jenkins
Branch: master

commit aa303d724c2c1db5bad5d3aadad6c4a6d6c85004
Author: Trevor McKay <email address hidden>
Date: Fri Dec 13 13:36:04 2013 -0500

    Change "Jar" job type to "MapReduce"

    Changes the "Jar" job type to "MapReduce". This maps more closely
    to the underlying Oozie actions, and will help remove ambiguity when
    Savanna supports Oozie "java" actions in the future.

    Backward compatibility is supported as follows:
    1) Any job created through the conductor with job type "Jar" will
    have its job type automatically changed to "MapReduce"

    2) Tests for job_type "Jar" have been changed to test for membership
    in ["Jar", "MapReduce"]. This should support existing jobs in a
    savanna database with type "Jar", even though all new jobs will be
    "MapReduce"

    These measures should allow this change to work with a UI which is
    still using the "Jar" job type.

    Closes-Bug: #1260829

    Change-Id: I1ad59fa466b9a5d838c62bf366b642e453340bce